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| 型号： | LTM4605EV#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 15/26页 |
| 文件大小： | 0K |
| 描述： | IC DC/DC UMODULE 5A 141-LGA |
| 产品培训模块： | Buck-Boost uModule Regulators High Voltage µModule DC/DC Regulators Power Module vs. Discrete DC to DC |
| 软件下载： | LTM4605 Spice Model LTM460(5,7) Spice Models |
| 产品目录绘图： | LTM Series_15x15x2.8 |
| 设计资源： | LTM4605EV#PBF Footprint.bxl |
| 特色产品： | μModule Products DC/DC μModule Regulator Family |
| 标准包装： | 119 |
| 系列： | µModule® |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 4.5V |
| 电压 - 输入（最大）： | 20V |
| Voltage - Output 1： | 0.8 ~ 16 V |
| 电流 - 输出（最大）： | 5A |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 141-LGA |
| 尺寸/尺寸： | 0.59" L x 0.59" W x 0.11" H（15.0mm x 15.0mm x 2.8mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 98% |
| 产品目录页面： | 2711 (CN2011-ZH PDF) |
LTM4605
APPLICATIONS INFORMATION
0.6
1.5μH
V OUT = 12V
? = 400kHz
If a total low ESR about 5m Ω is chosen for output capaci-
tors, the maximum output ripple of 70mV occurs at the
input voltage of 5V with the peak inductor current at 14A.
0.4
0.2
2.5μH
3.3μH
4.7μH
Wide Input Mode Operation
If a wide input range is required from 5V to 20V, the module
will work in different operation modes. If input voltage
V IN = 5V to 20V, V OUT = 12V and f = 400kHz, the design
needs to consider the worst case in buck or boost mode
0
5
6
7 8 9 10
INPUT VOLTAGE V IN (V)
11 12
4605 F04
design. Therefore, the maximum output power is limited
to 60W. The sensing resistor is chosen at 7m Ω , the input
capacitor is the same as the buck mode design and the
Figure 4. Current Ripple Ratio at Different Inputs for Boost Mode
At boost mode, sensing resistor selection is based on
the maximum input current and the allowed maximum
sensing threshold 160mV.
output capacitor uses the boost mode design. Since the
maximum output ripple normally occurs at boost mode
in the wide input mode design, more inductor ripple cur-
rent, up to 150% of the inductor current, is allowed at
buck mode to meet the ripple design requirement. Thus,
R SENSE =
2?
2 ? 160mV
P
+ Δ I L
η ? V IN(MIN)
a 3.3μH inductor is chosen at the wide input mode. The
maximum output ripple voltage is still 70mV if the total
ESR is about 5m Ω .
Additionally, the current limit may become very high when
Consider the safety margin about 30%, we can choose
the sensing resistor as 7m Ω .
For the input capacitor, only minimum capacitors are
needed to handle the maximum RMS current, since it
is a continuous input current at boost mode. A 100μF
capacitor is only needed if the input source impedance is
compromised by long inductive leads or traces.
Since the output capacitors at boost mode need to ?lter
the module runs at buck mode due to the low sensing
resistor used in the wide input mode operation.
Safety Considerations
The LTM4605 modules do not provide isolation from V IN to
V OUT . There is no internal fuse. If required, a slow blow fuse
with a rating twice the maximum input current needs to be
provided to protect each unit from catastrophic failure.
the square wave current, more capacitors are expected
to achieve the same output ripples as the buck mode. If
assuming that the ESR dominates the output ripple, the
output ripple is as follows:
Δ V OUT(P-P) = ESR ? I L(MAX)
4605fc
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTM4605IV#PBF | 功能描述:IC DC/DC UMODULE 5A 141-LGA RoHS:是 类别:电源 - 板载 >> DC DC Converters 系列:µModule® 设计资源:VI-200, VI-J00 Design Guide, Appl Manual 标准包装:1 系列:* 类型:隔离 输出数:1 电压 - 输入（最小）:21V 电压 - 输入（最大）:32V Voltage - Output 1:5V Voltage - Output 2:- Voltage - Output 3:- 电流 - 输出（最大）:* 电源（瓦） - 制造商系列:100W 电压 - 隔离:* 特点:* 安装类型:通孔 封装/外壳:9-SlimMod 尺寸/尺寸:4.60" L x 1.80" W x 0.52" H（116.8mm x 45.7mm x 13.2mm） 包装:散装 工作温度:-25°C ~ 85°C 效率:* 电源（瓦特）- 最大:* |
| LTM4605IV#PBF | 制造商:Linear Technology 功能描述:DC/DC MICRO MODULE IC |
| LTM4605IVPBF | 制造商:Linear Technology 功能描述:Conv DC-DC Step Up Step Down |
| LTM4605IV-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Effi ciency Buck-Boost DC/DC μModule |
| LTM4605RD | 功能描述:LED 电路板指示器 Vert LED Assmbly 5mm Red RoHS:否 制造商:Lumex LED 大小:3 mm 照明颜色:Green 波长:565 nm 光强度:30 mcd 安装类型:SMD/SMT 显示角:60 deg 封装:Reel |
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